Engine for an airplane



FIG. 1 is a front elevation view of an engine for an airplane, showing our new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a front perspective view 1 thereof;

FIG. 7 is a front perspective view 2 thereof;

FIG. 8 is a rear perspective view 1 thereof; and,

FIG. 9 is a rear perspective view 2 thereof. 

What is claimed; the ornamental design for an engine of an airplane, as shown and described. 